Romans 1:21
Because knowing God, they didn’t glorify him as God, and didn’t give thanks, but became vain in their reasoning, and their senseless heart was darkened.
World English Bible (Public Domain)
In context
Before · Romans 1:19–20
19because that which is known of God is revealed in them, for God revealed it to them. 20For the invisible things of him since the creation of the world are clearly seen, being perceived through the things that are made, even his everlasting power and divinity, that they may be without excuse.
21Because knowing God, they didn’t glorify him as God, and didn’t give thanks, but became vain in their reasoning, and their senseless heart was darkened.